According to four units, each unit has three households per floor, and each household has three people, and a building can accommodate about 250 people.

In other words, three or four hundred thousand zombies can fill 12,000 to 16,000 buildings, what an exaggerated number.

For example, the size of a standard football field is 105 meters long and 68 meters wide, because even low-level zombies are relatively tall, belonging to small giants about two and a half meters high, so if a standard football field can squeeze out a thousand low-level zombies.

Three or four hundred thousand zombies can also occupy three or four hundred standard football fields.

If you are entangled by so many zombies, even if the level of the pet beasts is relatively high, and the low-level zombies are vulnerable in front of them, it will still make the pet beasts in a state of exhaustion.

So in order not to be entangled by zombies, all the pet beasts at that time did not fall in love with each other under Wang Dong's orders, but chose to break through.

And in Wang Dong's temporary plan, these mid-level zombies are still somewhat useful, so that these mid-level zombies can survive.

But now it's different, there are only more than 30,000 low-level zombies left, which doesn't take long for the pet beast legion, even if it doesn't need the 'help' of middle-level zombies.

Compared to the efficiency of killing low-level zombies, the efficiency of these pet beasts in killing middle-level zombies is not much lower.

Although they were a little tired because they had slaughtered a large number of low-level zombies before. However, this kind of exhaustion is very normal, even if you work for two hours in a row, you will be a little tired, let alone fight for more than two hours in a row.

However, this is far from reaching their limit, after all, it is just a slaughter of low-level zombies, and they will not use all their strength.

If you use all your strength, let alone two hours, twenty minutes is a great thing.

It takes a lot of physical strength and energy to fight at full strength, and in the battle of the same level after the end of the world, there will definitely be no situation in martial arts.

Two peerless masters fought against each other, and before the fight started, they first looked at each other for three days and three nights, and then fought for four or five days. Results are usually available quickly.

Like boxers before the end of the world, at that time, an international boxing professional match was about 23 minutes, and a round was 3 minutes, and there was a rest and massage in between.

But if you don't have to do your best when you're training, you have to train for hours every day.

So when killing low-level zombies, it's a bit like regular training, not to mention two hours, and two more hours is not a problem.

For more than two hours, these mid-level zombies have been persistently chasing after those foods that have a fatal attraction to them.

The long-term chase had already made them unusually irritable, so when the food didn't run away, but rushed towards them, they were suddenly happy, and they screamed and bumped into the pet beast head-on.

Intermediate zombies don't look like they already have the intelligence of beasts, but in fact, sometimes they are not as good as ordinary beasts.

If an ordinary beast encounters an enemy that is obviously stronger than itself, it will not be as excited as these mid-level zombies to fight, but will turn around and flee.

After all, the world is big, and his net worth is the largest, so he can stay in the green mountains without worrying about running out of firewood, which is the most reasonable.

But mid-level zombies won't be like this, in their eyes, the sky and the earth are big, and the food is the biggest, as long as the food is in front of them, no one can stop them except for their higher-level peers.

However, it is precisely because of this fearlessness of life and death and never retreating that human beings are defeated under the attack of zombies who have no emotions and only know crazy killing.

If it weren't for that, then maybe humanity wouldn't have ended up in such a mess.

There is a saying that newborn calves are not afraid of tigers, which means that newborn calves are not even afraid of tigers.

But if you are not afraid, you can beat it or not, so after the collision between the mid-level zombies and the pet beast army, the whole situation is one-sided.

Don't look at the number of mid-level zombies is ten times that of pet beasts, but in terms of strength, it is more than ten times weaker.

Among the mid-level zombies in their early 3,000s, nearly ninety percent are only fourth-level zombies, which is much stronger than low-level zombies, but compared with sixth-level pet beasts, it is not enough at all.

The remaining Yicheng are fifth-level zombies and sixth-level zombies, and the sixth-level zombies who can barely compete with sixth-level pet beasts are estimated to be less than thirty.

And these pet beasts will not give them a chance to fight fairly, all sixth-level zombies are basically targeted by seventh- and eighth-level pet beasts, and the sixth-level and seventh-level ones themselves are a threshold, a very high threshold.

The resulting gap between level six and level seven is much larger than the gap between level five and level six.

Therefore, after these dozens of sixth-level zombies were targeted by seventh- and eighth-level pet beasts, they didn't even hold out for a minute, and they were all killed.

Although the remaining fourth- and fifth-level zombies have an advantage in numbers, they are too far behind in terms of strength.

After intermediate-level zombies come into contact with pet beasts, the number of them begins to drop dramatically over time. No matter how desperate these mid-level zombies are, no matter how fearless they are of life and death, in the face of absolute strength, they are useless and cannot be stopped.

Half an hour later, not a single zombie on the entire battlefield could stand up, only the zombies that were not dead were struggling on the ground, and the sound of teeth clacking into each other rattled together.

However, even when he is free to move, he can't cause damage to the pet beast, let alone the current incomplete state.

When the zombie evolves to the third level, there are not many decaying parts on the body, and when it evolves to the fourth level, there is no sign of decay at all.

However, no matter how many levels of their blood were, they would emit a fishy and unpleasant rancid smell, and the smell of blood from hundreds of thousands of zombies gathered together.

Even Wang Dong had experienced this kind of scene many times, and he almost fainted, so he quickly retreated a long way to get better.

Only the pet beasts diligently and conscientiously carried out Wang Dong's orders, digging crystal nuclei one by one.

The action of digging the crystal nucleus is very simple, smash the zombie's head with a light kick, as easy as stepping on an egg, and then pick out the crystal nucleus and walk to the next zombie corpse.

However, although this job is simple, it is also a waste of time, and it is a slow and meticulous work.

On average, each pet beast has to dig out nearly a thousand crystal nuclei, even if it takes three seconds to dig one crystal nucleus, it will take an hour to dig them all.